25370891953 has 12 divisors (see below), whose sum is σ = 29527428420. Its totient is φ = 21707713280.

The previous prime is 25370891927. The next prime is 25370891977. The reversal of 25370891953 is 35919807352.

It can be written as a sum of positive squares in 2 ways, for example, as 14606414449 + 10764477504 = 120857^2 + 103752^2 .

It is a de Polignac number, because none of the positive numbers 2^k-25370891953 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25370891953.

It is not an unprimeable number, because it can be changed into a prime (25370891983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6164908 + ... + 6169021.

It is an arithmetic number, because the mean of its divisors is an integer number (2460619035).

Almost surely, 2^25370891953 is an apocalyptic number.

It is an amenable number.

25370891953 is a deficient number, since it is larger than the sum of its proper divisors (4156536467).

25370891953 is a wasteful number, since it uses less digits than its factorization.

25370891953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12333968 (or 12333957 counting only the distinct ones).

The product of its (nonzero) digits is 2041200, while the sum is 52.

The spelling of 25370891953 in words is "twenty-five billion, three hundred seventy million, eight hundred ninety-one thousand, nine hundred fifty-three".